Apparatus

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sensors Mode-S transponder

AD1218

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N941NN · BOEING 737-800 · operated by UMB BANK NA TRUSTEE

Hex
AD1218
Octal
53211030
Decimal
11,342,360
Country
US
Tail
N941NN
Type
B738
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
575
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S AD1218.

Country allocation

The ICAO 24-bit address AD1218 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
AAL2001 American Airlines 7 2026-06-02
AAL2672 American Airlines 6 2026-05-03
AAL1478 American Airlines 6 2026-06-16
AAL603 - 5 2026-07-11
AAL2973 American Airlines 4 2026-04-15
AAL2906 - 4 2026-07-16
AAL2896 American Airlines 4 2026-06-11
AAL2822 American Airlines 4 2026-04-14
AAL2757 - 4 2026-07-15
AAL2367 American Airlines 4 2026-05-13
AAL2221 American Airlines 4 2026-04-20
AAL1944 American Airlines 4 2026-07-26
AAL1919 American Airlines 4 2026-04-20
AAL1915 - 4 2026-06-25
AAL1866 American Airlines 4 2026-05-04
AAL1615 American Airlines 4 2026-05-07
AAL1565 American Airlines 4 2026-05-16
AAL985 American Airlines 3 2026-05-14
AAL928 American Airlines 3 2026-05-03
AAL893 American Airlines 3 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1573 CMH → CLT Jul 26, 21:15 UTCJul 26, 22:00 UTC45m
2026-07-26 AAL1573 CMH → CLT Jul 26, 18:25 UTCJul 26, 20:00 UTC1h 35m
2026-07-26 AAL1944 TPA → DCA Jul 26, 15:50 UTCJul 26, 16:55 UTC1h 5m
2026-07-26 AAL1944 TPA → DCA Jul 26, 13:15 UTCJul 26, 14:40 UTC1h 25m
2026-07-26 AAL3206 PUJ → CLT Jul 26, 10:05 UTCJul 26, 10:55 UTC50m
2026-07-26 AAL1156 MIA → BOS Jul 26, 01:55 UTCJul 26, 05:25 UTC3h 30m
2026-07-26 AAL1156 MIA → BOS Jul 26, 01:52 UTCJul 26, 05:24 UTC3h 32m
2026-07-25 AAL3186 SLC → PHX Jul 25, 23:50 UTCJul 26, 00:50 UTC1h 0m
2026-07-25 AAL2877 NAS → ORD Jul 25, 19:00 UTCJul 25, 22:20 UTC3h 20m
2026-07-25 AAL3022 MIA → LGA Jul 25, 14:40 UTCJul 25, 16:50 UTC2h 10m
2026-07-25 AAL3022 MIA → LGA Jul 25, 11:25 UTCJul 25, 13:15 UTC1h 50m
2026-07-24 AAL1639 CLT → LGA Jul 24, 22:15 UTCJul 25, 04:25 UTC6h 10m
2026-07-24 AAL2112 - Jul 24, 17:30 UTCJul 24, 18:55 UTC1h 25m
2026-07-24 AAL574 PIT → DFW Jul 24, 02:00 UTCJul 24, 02:45 UTC45m
2026-07-24 AAL574 PIT → DFW Jul 24, 00:05 UTCJul 24, 01:55 UTC1h 50m
2026-07-23 AAL2257 STL → PHL Jul 23, 20:15 UTCJul 23, 22:00 UTC1h 45m
2026-07-23 AAL2257 STL → PHL Jul 23, 20:13 UTCJul 23, 22:00 UTC1h 47m
2026-07-23 AAL2079 ORD → LGA Jul 23, 16:40 UTCJul 23, 18:35 UTC1h 55m
2026-07-23 AAL2079 ORD → LGA Jul 23, 13:10 UTCJul 23, 14:40 UTC1h 30m
2026-07-23 AAL1424 ORD → FLL Jul 23, 01:45 UTCJul 23, 03:30 UTC1h 45m
2026-07-22 AAL2060 SJU → PHL Jul 22, 16:30 UTCJul 23, 00:10 UTC7h 40m
2026-07-22 AAL1591 RDU → LGA Jul 22, 13:20 UTCJul 22, 15:05 UTC1h 45m
2026-07-22 AAL1472 DFW → MSY Jul 22, 03:45 UTCJul 22, 04:50 UTC1h 5m
2026-07-22 AAL1728 DTW → PHX Jul 22, 00:10 UTCJul 22, 02:00 UTC1h 50m
2026-07-22 AAL1728 DTW → PHX Jul 22, 00:08 UTCJul 22, 01:57 UTC1h 49m
2026-07-21 AAL1728 DTW → PHX Jul 21, 21:10 UTCJul 21, 23:10 UTC2h 0m
2026-07-21 AAL877 DFW → DFW Jul 21, 13:45 UTCJul 21, 19:30 UTC5h 45m
2026-07-21 AAL2472 DTW → PHX Jul 21, 08:55 UTCJul 21, 11:50 UTC2h 55m
2026-07-21 AAL2472 DTW → PHX Jul 21, 08:50 UTCJul 21, 11:49 UTC2h 59m
2026-07-21 AAL3174 PHX → FAT Jul 21, 05:29 UTCJul 21, 06:48 UTC1h 19m
2026-07-21 AAL3174 - Jul 21, 05:30 UTCJul 21, 06:35 UTC1h 5m
2026-07-21 AAL2639 ORD → SFO Jul 21, 02:25 UTCJul 21, 03:20 UTC55m
2026-07-21 AAL2639 ORD → SFO Jul 21, 00:20 UTCJul 21, 01:05 UTC45m
2026-07-20 AAL1750 MSP → PHX Jul 20, 20:15 UTCJul 20, 23:05 UTC2h 50m
2026-07-20 AAL1750 PHX → MSP Jul 20, 15:45 UTCJul 20, 18:30 UTC2h 45m
2026-07-20 AAL455 AUS → PHX Jul 20, 11:30 UTCJul 20, 13:25 UTC1h 55m
2026-07-20 AAL691 PHX → AUS Jul 20, 03:45 UTCJul 20, 05:40 UTC1h 55m
2026-07-20 AAL691 PHX → AUS Jul 20, 03:41 UTCJul 20, 05:35 UTC1h 54m
2026-07-19 AAL441 SRQ → ORD Jul 19, 22:10 UTCJul 20, 02:20 UTC4h 10m
2026-07-19 AAL550 JAX → PHL Jul 19, 15:45 UTCJul 19, 20:20 UTC4h 35m
2026-07-19 AAL2601 ORD → PVR Jul 19, 10:30 UTCJul 19, 14:20 UTC3h 50m
2026-07-19 AAL1286 DCA → BDL Jul 19, 02:00 UTCJul 19, 03:40 UTC1h 40m
2026-07-19 AAL1286 DCA → BDL Jul 19, 01:55 UTCJul 19, 03:39 UTC1h 44m
2026-07-18 AAL530 SYR → CLT Jul 18, 21:35 UTCJul 19, 00:20 UTC2h 45m
2026-07-18 AAL530 - Jul 18, 17:10 UTCJul 18, 18:00 UTC50m
2026-07-18 AAL530 SYR → CLT Jul 18, 17:10 UTCJul 18, 20:07 UTC2h 57m
2026-07-18 AAL1591 MSY → MIA Jul 18, 13:10 UTCJul 18, 15:20 UTC2h 10m
2026-07-18 AAL2196 - Jul 18, 01:05 UTCJul 18, 02:40 UTC1h 35m
2026-07-17 AAL914 CTG → MIA Jul 17, 20:22 UTCJul 17, 22:43 UTC2h 21m
2026-07-17 AAL2173 - Jul 17, 16:34 UTCJul 17, 16:59 UTC25m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N941NN page for operator, model, and routing details .

Mode-S AD1218 frequently asked

What is Mode-S code AD1218?
AD1218 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N941NN.
Where is Mode-S AD1218 registered?
Mode-S code AD1218 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is AD1218 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD1218, octal 53211030, decimal 11,342,360.
What flights does AD1218 operate?
Mode-S AD1218 has broadcast 20 distinct callsigns, including AAL2001, AAL2672, AAL1478, AAL603, AAL2973.